{"product_id":"aunex-ac2000k4-4-channel-car-amplifier-350w-rms","title":"AC2000K4","description":"\u003cstyle\u003e\n  :root {\n    --red:       #8b0000;\n    --red-dim:   #600000;\n    --page-bg:   #ffffff;\n    --surface-2: #f5f5f2;\n    --surface-3: #eeeeea;\n    --border:    #ddddd8;\n    --ink:       #111110;\n    --ink-soft:  #333330;\n    --mid-text:  #666660;\n    --mono:      'Share Tech Mono', monospace;\n    --red-light: #f0e4e4;\n    --red-mid:   #d4a0a0;\n  }\n\n  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n  .seo-card {\n    background: var(--page-bg);\n    border-top: 1px solid var(--border);\n    padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n    font-size: 16px;\n  }\n\n  .seo-card-inner {\n    display: grid;\n    grid-template-columns: 1fr;\n    gap: 60px;\n  }\n\n  \/* ─── LEAD ─── *\/\n  .seo-lead-tag {\n    font-family: var(--mono);\n    font-size: 12px;\n    color: var(--red);\n    letter-spacing: 0.22em;\n    text-transform: uppercase;\n    display: block;\n    margin-bottom: 16px;\n  }\n\n  .seo-lead-title {\n    font-family: 'Barlow Condensed', sans-serif;\n    font-weight: 800;\n    font-size: clamp(32px, 4vw, 52px);\n    line-height: 1;\n    text-transform: uppercase;\n    letter-spacing: 0.01em;\n    color: var(--ink);\n    margin-bottom: 24px;\n  }\n\n  .seo-lead-title .red { color: var(--red); }\n\n  .seo-lead-intro {\n    font-size: 15.5px;\n    line-height: 1.8;\n    color: var(--ink-soft);\n    max-width: 820px;\n  }\n\n  .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n  \/* ─── BODY GRID ─── *\/\n  .seo-body {\n    display: grid;\n    grid-template-columns: repeat(3, 1fr);\n    gap: 2px;\n    background: var(--border);\n  }\n\n  .seo-block {\n    background: var(--page-bg);\n    padding: 32px 28px;\n    transition: background 0.2s;\n    position: relative;\n    overflow: hidden;\n  }\n\n  .seo-block::after {\n    content: '';\n    position: absolute;\n    bottom: 0; left: 0; right: 0;\n    height: 2px;\n    background: var(--red);\n    transform: scaleX(0);\n    transform-origin: left;\n    transition: transform 0.3s ease;\n  }\n\n  .seo-block:hover { background: var(--surface-2); }\n  .seo-block:hover::after { transform: scaleX(1); }\n\n  .seo-block h3 {\n    font-family: 'Barlow Condensed', sans-serif;\n    font-weight: 600;\n    font-size: 16px;\n    text-transform: uppercase;\n    letter-spacing: 0.06em;\n    color: var(--ink);\n    margin-bottom: 10px;\n  }\n\n  .seo-block p {\n    font-size: 13.5px;\n    line-height: 1.7;\n    color: var(--mid-text);\n    font-family: 'Open Sans', sans-serif;\n    font-weight: 300;\n  }\n\n  \/* ─── KEYWORD TAGS ─── *\/\n  .seo-tags {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 8px;\n    padding-top: 8px;\n    border-top: 1px solid var(--border);\n  }\n\n  .seo-tag {\n    font-family: var(--mono);\n    font-size: 11px;\n    letter-spacing: 0.12em;\n    text-transform: uppercase;\n    color: var(--mid-text);\n    border: 1px solid var(--border);\n    padding: 6px 14px;\n    background: var(--surface-2);\n  }\n\n  \/* ─── RESPONSIVE ─── *\/\n  @media (max-width: 900px) {\n    .seo-card { padding: 72px 24px; }\n    .seo-body { grid-template-columns: 1fr; }\n  }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n  \u003cdiv class=\"seo-card-inner\"\u003e\n\n    \u003c!-- LEAD --\u003e\n    \u003cdiv class=\"seo-lead\"\u003e\n      \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Compact Full-Range Digital 4-Channel · 2026 Edition\u003c\/span\u003e\n      \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC2000\u003cspan class=\"red\"\u003eK4\u003c\/span\u003e — 350W × 4 RMS\u003cbr\u003e4-Channel Car Amplifier | Full-Range Digital\u003c\/h2\u003e\n      \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC2000K4 is a compact full-range digital 4-channel amplifier built for high-output front and rear staging. Rated at \u003cstrong\u003e350W RMS per channel at 4 ohms\u003c\/strong\u003e and \u003cstrong\u003e500W RMS per channel at 2 ohms\u003c\/strong\u003e — all four channels driven simultaneously, independently verified — it delivers consistent, measurable output in every configuration. Bridge any pair for 1,000W RMS stereo output. Four channels. One standard. No compromise.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- BODY BLOCKS --\u003e\n    \u003cdiv class=\"seo-body\"\u003e\n\n      \u003cdiv class=\"seo-block\"\u003e\n        \u003ch3\u003eIndependently Verified RMS — All 4 Channels\u003c\/h3\u003e\n        \u003cp\u003e350W RMS per channel at 4Ω. 500W per channel at 2Ω. 1,000W per pair bridged at 4Ω. All four channels tested simultaneously at rated load — not one channel driven while the others idle. What’s on the spec sheet is what comes out of all four terminals, in every configuration.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"seo-block\"\u003e\n        \u003ch3\u003eFour Channels. Any Configuration.\u003c\/h3\u003e\n        \u003cp\u003eRun all four channels for a full front and rear stage at 350W RMS each. Bridge to two channels for 1,000W RMS stereo — powerful enough to drive a subwoofer while the remaining pair handles your front stage. Or bridge one pair for a dedicated sub output and run the other two full-range. The AC2000K4 adapts to the build, not the other way around.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"seo-block\"\u003e\n        \u003ch3\u003eWide-Range HPF and LPF — 12dB\/Octave\u003c\/h3\u003e\n        \u003cp\u003eHigh-pass filtering from 400Hz to 4kHz and low-pass filtering from 40Hz to 400Hz give surgical crossover control over every channel — enough range to integrate tweeters, mid-bass drivers, and a subwoofer precisely, without a separate outboard processor. The 18dB\/octave slope delivers a steeper, more controlled rolloff than most 4-channel amplifiers at this price point.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"seo-block\"\u003e\n        \u003ch3\u003eSelf-Recovering 4-Way Protection\u003c\/h3\u003e\n        \u003cp\u003eThermal shutdown, short-circuit, over-voltage, and under-voltage protection operate across all four channels independently. Short-circuit protection on the AC2000K4 is self-recovering — the amplifier detects the fault, shuts down the affected channel, and resumes automatically once the condition clears. No manual reset. No trip to the trunk.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"seo-block\"\u003e\n        \u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n        \u003cp\u003eWhere most 4-channel amplifiers at this price point use a 2-layer PCB, the AC2000K4 is built on a 4-layer surface-mount design. Dedicated internal power and ground planes reduce impedance across all four output stages simultaneously, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over the long term.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"seo-block\"\u003e\n        \u003ch3\u003eBalanced Inputs — OEM Compatible\u003c\/h3\u003e\n        \u003cp\u003eZero-Point Balanced inputs (CMRR architecture) reject alternator whine and ignition interference at the point of entry. Input sensitivity spans 400mV to 20V — compatible with factory OEM head units via high-level input, aftermarket receivers, and DSP processors. Spectra-Core RGB illumination and LED clipping indicator are integrated standard, no additional kits required.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n    \u003c\/div\u003e\n\n    \u003c!-- KEYWORD TAGS --\u003e\n    \u003cdiv class=\"seo-tags\"\u003e\n      \u003cspan class=\"seo-tag\"\u003e4-Channel Car Amplifier\u003c\/span\u003e\n      \u003cspan class=\"seo-tag\"\u003e350W x 4 RMS\u003c\/span\u003e\n      \u003cspan class=\"seo-tag\"\u003eFull-Range Car Amp\u003c\/span\u003e\n      \u003cspan class=\"seo-tag\"\u003eBridgeable 4-Channel\u003c\/span\u003e\n      \u003cspan class=\"seo-tag\"\u003e1000W Bridged\u003c\/span\u003e\n      \u003cspan class=\"seo-tag\"\u003e4-Layer SMD PCB\u003c\/span\u003e\n      \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n      \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043992592481,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/aunexusa.com\/products\/aunex-ac2000k4-4-channel-car-amplifier-350w-rms","provider":"AUNEX","version":"1.0","type":"link"}